@article {1650,
	title = {Use of a field release system to distinguish the effects of dose and concentration of sulphur dioxide on winter barley.},
	volume = {38},
	year = {1992},
	pages = {3-10},
	author = {Colls, J.J. and Geissler, P.A. and Baker, C.K.}
}
@article {1632,
	title = {Depression of Growth and Yield in Winter Barley Exposed to Sulphur Dioxide in the Field.},
	volume = {104},
	year = {1986},
	pages = {233-241},
	author = {Baker, C.K. and Colls, J.J. and Fullwood, A.E. and Seaton, G.G.R.}
}
